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1 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 #include <es_ini.h> |
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17 #include <flow.h> |
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18 |
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19 #include "iface.h" |
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20 #include "context.h" |
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21 #include "async_request.h" |
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22 #include "tc.h" |
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23 #include "guqos_log.h" |
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24 #include "guqos.h" |
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25 |
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26 #ifdef _LOG |
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27 // Ugly use of function from another module (context.cpp), but this debugging only! |
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28 extern void LogPacketFilter(const TPacketFilter& aFilter); |
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29 #endif |
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30 |
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31 CFlowData* CFlowData::NewL(CFlowContext& aHandle, CNif& aNif, CFlowData *aNext) |
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32 { |
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33 CFlowData* flowData = new (ELeave) CFlowData(aHandle, aNif); |
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34 CleanupStack::PushL(flowData); |
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35 flowData->ConstructL(); |
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36 CleanupStack::Pop(); |
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37 flowData->iNext = aNext; |
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38 return flowData; |
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39 } |
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40 |
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41 CFlowData* CFlowData::Find(const CFlowContext* aHandle, CFlowData *aList) |
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42 { |
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43 while (aList) |
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44 { |
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45 if (&aList->iFlowContext == aHandle) |
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46 break; |
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47 aList = aList->iNext; |
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48 } |
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49 return aList; |
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50 } |
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51 |
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52 CFlowData* CFlowData::Remove(const CFlowContext* aHandle, CFlowData **aList) |
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53 { |
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54 CFlowData* p = NULL; |
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55 for ( ; (p = *aList) != NULL; aList = &p->iNext) |
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56 { |
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57 if (&p->iFlowContext == aHandle) |
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58 { |
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59 *aList = p->iNext; |
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60 break; |
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61 } |
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62 } |
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63 return p; |
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64 } |
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65 |
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66 void CFlowData::SetContext(CPdpContext *aContext) |
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67 /** |
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68 * Associate the flow with a new context (or none). |
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69 * |
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70 * Move the flow from one context to another. The |
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71 * internal CClose reuqest is not triggered. (It's |
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72 * only used in destructor). |
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73 * |
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74 * @param aContext The new context (or NULL) |
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75 */ |
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76 { |
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77 if (iContext == aContext) |
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78 { |
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79 // Already attache to this context (or NONE) -- nothing to do. |
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80 return; |
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81 } |
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82 |
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83 if (iContext) |
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84 { |
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85 // Remove from previous context. |
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86 iLink.Deque(); |
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87 iContext->FlowDetached(); |
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88 } |
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89 iContext = aContext; |
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90 if (iContext) |
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91 { |
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92 // Add to new context. |
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93 iContext->Flows().AddLast(*this); |
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94 iContext->FlowAttached(); |
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95 } |
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96 MEventInterface *notifier = Nif().Module().QoSEvent(); |
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97 if (notifier) |
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98 { |
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99 // Determine the blocked or unblocked status for the flow |
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100 // and notify upwards accordingly... |
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101 |
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102 // Throw away "const". The MEventInterface is misdeclared to |
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103 // use non-const reference parameter, when const reference |
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104 // would be the correct way... |
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105 if (iContext == NULL || iContext->IsFlowBlocked()) |
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106 notifier->BlockFlow((CFlowContext &)iFlowContext); |
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107 else |
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108 notifier->UnBlockFlow((CFlowContext &)iFlowContext); |
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109 } |
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110 } |
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111 |
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112 |
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113 CFlowData::CFlowData(CFlowContext& aHandle, CNif& aNif) : |
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114 iNif(aNif), iFlowContext(aHandle) |
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115 { |
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116 |
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117 iContext = NULL; |
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118 |
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119 // Initialize constant filter values from TPacketHead. |
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120 const TPacketHead& h = aHandle.iHead; |
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121 Mem::Copy(iPacketFilter.iSrcAddr, h.ip6.DstAddr().u.iAddr8, sizeof(iPacketFilter.iSrcAddr)); |
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122 Mem::Fill(iPacketFilter.iSrcAddrSubnetMask, sizeof(iPacketFilter.iSrcAddrSubnetMask), 0xFF); |
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123 iPacketFilter.iProtocolNumberOrNextHeader = h.iProtocol; |
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124 iPacketFilter.iSrcPortMin = h.iDstPort; |
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125 iPacketFilter.iSrcPortMax = h.iDstPort; |
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126 iPacketFilter.iDestPortMin = h.iSrcPort; |
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127 iPacketFilter.iDestPortMax = h.iSrcPort; |
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128 iPacketFilter.iTOSorTrafficClass = 0; |
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129 LOG(Log::Printf(_L("new\tflow[%u] size=%d"), (TInt)this, sizeof(*this))); |
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130 LOG(LogPacketFilter(iPacketFilter)); |
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131 |
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132 // The filter is for the *INCOMING* traffic! Predicting the values |
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133 // of the following fields from the *OUTGOING* flow would be |
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134 // dubious!! |
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135 |
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136 /* iPacketFilter.iIPSecSPI = ??? */ |
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137 /* iPacketFilter.iTOSorTrafficClass = h.ip6.TrafficClass() ? */ |
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138 /* iPacketFilter.iFlowLabel = h.ip6.FlowLabel() ? */ |
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139 } |
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140 |
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141 CFlowData::~CFlowData() |
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142 { |
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143 if (iContext) |
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144 { |
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145 // The flow is still attached to a contex. |
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146 iLink.Deque(); |
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147 iContext->FlowDetached(); |
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148 } |
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149 LOG(Log::Printf(_L("~\tflow[%u]"), (TInt)this)); |
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150 } |
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151 |
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152 void CFlowData::ConstructL() |
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153 { |
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154 } |
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155 |
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156 TInt CFlowData::Send(RMBufChain& aPacket, RMBufSendInfo& aInfo) |
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157 { |
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158 // Note: the fact that we are here, means that the CFlowContex in the aInfo |
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159 // is same as CFlowContext associated with CFlowData. ASSERT is only a |
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160 // remainder of this and never expect to fire. |
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161 ASSERT(aInfo.iFlow.FlowContext() == &iFlowContext); |
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162 if (iContext) |
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163 { |
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164 aInfo.iDstAddr.SetPort(iContext->ContextId()); |
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165 // Note: this assumes that the Send below does to come back |
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166 // and delete structures from under us! If this becomes |
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167 // possible, then at least CFlowData and possibly CPdpContext |
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168 // need to be protected against destruction... |
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169 const TInt ret = aInfo.iFlow.FlowContext()->Send(aPacket); |
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170 if (ret <= 0) |
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171 { |
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172 // Packet accepted, but cannot send any more packets |
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173 // to this context, until it is unblocked. |
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174 LOG(Log::Printf(_L("Send\tflow[%u] returns %d, blocking PDP context id = %d"), (TInt)this, ret, iContext->ContextId())); |
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175 iContext->Block(); |
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176 } |
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177 } |
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178 else |
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179 { |
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180 LOG(Log::Printf(_L("Send\tflow[%u] has no PDP context -- packet dropped"), (TInt)this)); |
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181 aInfo.iFlow.Close(); |
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182 aPacket.Free(); |
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183 } |
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184 // Always eat the packet! |
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185 return 1; |
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186 } |
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187 |